33114 70x120x37mm Tapered Roller Bearing Manufacturers Low Friction

33114 70x120x37mm Tapered Roller Bearing is suitable for industrial applications.

I. Basic Parameters and Structural Design

• Bore diameter: 70mm
• Outer diameter: 120mm
• Total width: 37mm
• Outer ring width: 29mm
• Contact angle: 14.167° (medium contact angle design, suitable for both radial and unidirectional axial loads)
• Minimum chamfer size: r1s.r2s ≥ 2mm; r3s.r4s ≥ 1.5mm

• The inner ring assembly (including rollers and cage) and outer ring can be installed independently, facilitating preload adjustment and maintenance.
• Cage material is usually steel or nylon; some models use brass to enhance wear resistance.

• Main material: high-carbon chromium bearing steel (GCr15), with uniform surface hardness (HRC 58-62) and long wear life.
• Some manufacturers adopt carburized steel or optimized heat treatment processes to further improve material strength and fatigue resistance.

II. Load and Speed Performance

• Basic dynamic load rating (C): 176-211kN
• Basic static load rating (C0): 250-262kN
• Capable of withstanding combined radial and unidirectional axial loads under typical working conditions.

• Under oil lubrication:
  • Reference speed: 4,300r/min
  • Limiting speed: 5,300r/min
• Under grease lubrication:
  • Recommended speed: ≤ 3,100r/min (to reduce frictional heat accumulation).

III. Application Fields

• Industrial equipment: Robot joints, vibrating mills, packaging machinery, pulp and paper equipment, and other scenarios requiring axial positioning.
• Transportation: Automobile gearboxes, truck wheel bearings, railway traction motors, adapting to high-speed and heavy-load conditions.
• Engineering machinery: Slewing mechanisms of excavators, mining crushers, capable of withstanding impact loads and harsh environments.

IV. Design Advantages and Maintenance Key Points

1. Performance Advantages:
   • Low friction characteristics: Optimized contact design between rollers and raceways, combined with low-viscosity lubricants, can reduce operating power consumption by 15%-20%.
   • Installation flexibility: Paired back-to-back or face-to-face mounting allows preload adjustment to enhance shafting rigidity.
2. Maintenance Recommendations:
   • Clearance inspection: Axial runout should be controlled within 0.05-0.15mm; measure regularly with feeler gauges.
   • Lubrication cycle:
     • Normal working conditions: Replenish lithium-based grease every 3,000 hours.
     • High-temperature environments: Replenish every 1,000 hours, and use high-temperature resistant lubricants.
   • Installation specifications: Avoid direct hammering; hydraulic presses or heating to 80-100°C for hot mounting are recommended. Ensure the coaxiality error between the shaft and bearing housing is < 0.02mm.

V. Typical Technical Parameters Table

VI. Precautions

• When using in pairs, select products from the same batch to ensure consistency in clearance and contact angle.
• For long-term storage, keep sealed to prevent moisture, and use rust inhibitors to protect the surface from corrosion.
• Avoid contact with acidic or alkaline substances to prevent material degradation.